AL-KO AT4F Series, Operating And Assembly Instruction Manual

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Subject to changes in line with technical progress!
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Product description
3.3 Sample AT4F ATEX type plates
Each functional unit is assigned a separate type plate. The type plates contain the order number, position details, year of
manufacture, manufacturer's data as well as the design data. These type plates are externally attached to the unit.
Type plate
Fig. 4 Example of a type plate
3.3.1 ATEX type plate
The respective valid ATEX marking can be obtained both from the ATEX type plate on the air handling unit and from the
EU Declaration of Conformity in accordance with the ATEX Directive 2014/34/EU.
This table explains the relationship between zones, unit category and the equipment protection level (EPL):
EN 60079-10-1;
EN 60079-10-2
EU Directive 2014/34/EU EN 60079-0
Zones Equipment group Unit category Group EPL
1
II
2G
II
Gb
2 3G Gc
21 2D
III
Db
22 3D Dc
Zone 1 Area in which an explosive gas atmosphere can be expected to occur periodically or occasionally
during normal operation.
Zone 2 Area in which an explosive gas atmosphere is not expected to occur during normal operation. If it does
occur, then it is only of short duration.
Zone 21 Location at which an explosive dust atmosphere in the form of a cloud of dust in the air occasionally
occurs during normal operation.
Zone 22 Area in which it is unlikely that an explosive dust atmosphere in the form of a cloud of combustible
dust in air will occur when operated as intended. If it does occur, however, it is only for a short period
of time.
In the event of deviations from the ATEX standard temperature version, this must be specially marked.